Create Iphone, Ipadmini and Ipad screensaver and background

We need the following Screensavers out of the added Logo: - Iphone 4S - Iphone 5 - Ipad Mini - Ipad retina display in two versions: gray on white background / white on gray background (gray tone of the text) also we need the following versions of the four added background images: - Iphone 4S - Iphone 5 - Ipad Mini - Ipad retina display the logo should be added in the four different backgrounds as logo ( small, down in the left corner) so it will be visible in ios devices. We need every background in the different resolutions for the different devices.